1. Look up "medical school requirements." They generally have chemistry, physics, math, life science, and other requirements that coincide with each other with few nuances (most likely at the most specialized medical schools or programs). Go to
http://www.career.ucla.edu and scroll down the sidebar regarding pre-health students (and then specifically pre-med).
2. You have time to decide what you major in, believe it or not. (Of course, there is a specific window...) Consider that if (and when) you take English 4W and English 10A that you'll, for the former, satisfy one of the university writing II requirements, and that for the latter, you'll satisfy the Literary & Cultural Analysis GE. Do you want to take Spanish? Even if you don't plan on studying it formally, it is a valuable skill to have for the future.
3. You need English 4W for your English major/minor.
4. Physiological Science (lower-division courses) and pre-med requirements overlap considerably. Look up medical school requirements. Go to
http://cis.ucla.edu/studyarea/ and look at all of your major requirements.